function 全部() {
    x = document.getElementById("C1"); // 找到元素
    x.innerHTML = "空空如也";           // 改变内容
    y = document.getElementById("C2");
    y.innerHTML = "我也空空如也";
    z = document.getElementById("1");
    z.style.color = "#00AEEC";           // 改变样式
}
function 视频投稿() {
    x = document.getElementById("C1");
    x.innerHTML = "没东西";
    y = document.getElementById("C2");
    y.innerHTML = "偶吼吼";
    z = document.getElementById("2");
    z.style.color = "#00AEEC";
}
function 追番追剧() {
    x = document.getElementById("C1");
    x.innerHTML = "你还在看什么？";
    y = document.getElementById("C2");
    y.innerHTML = "一个子也没有啦";
    z = document.getElementById("3");
    z.style.color = "#00AEEC";
}
function 专栏() {
    x = document.getElementById("C1");
    x.innerHTML = "哇塞";
    y = document.getElementById("C2");
    y.innerHTML = "真锲而不舍";
    z = document.getElementById("4");
    z.style.color = "#00AEEC";
}